Crankshaft grinder



E. FUGLIE ET AL CRANKSHAFT GRINDER June 24, 1941.

2 Sheets-Sheet 1 Filed Aug. 31, 1939 Inventors s Attorneys Patented June 24, 1941 UNITED STATES ATENT OFFICE CRANKSHAFT GRINDER Elmer Fuglie and Ore Oelkers, Mazeppa, Minn.

Application August 31, 1939, Serial No. 292,948

4 Claims.

This invention relates to new and useful improvements in crankshaft grinders, the same being an improvement on our Patent No, 2,130,003, issued September 13, 1938.

The principal object of the present invention is to provide a grinder which can be mounted in such a manner in relation to a crankshaft as to take care of small irregularities in the work.

Another important object of the invention is to provide a crankshaft grinder in which various adjustments may be made to compensate for various requirements and conditions which must be taken care of.

These and other objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings Figure 1 represents a side elevational view of the grinder.

Figure 2 is a section on the line 22 of Figure 1.

Figure 3 is a fragmentary detailed sectional view on the line 33 of Figure 1.

Figure 4 is a fragmentary detailed sectional view on the line 44 of Figure 1.

Referring to the drawings wherein like numerals designate like parts, it can be seen in Figure 1, that numeral 5 represents the standard upwardly through which is disposed the drive shaft 6 for the grinder I. Numeral 8 denotes a laterally disposed arm defining a collar 9 through which the shank ID of the yoke structure H is slidably disposed.

As shown in Figures 1 and 2, numeral l2 generally refers to an adjusting unit. The machine is set to various shaft diameters by the proper setting of the block 13 of this unit 12. This block 13 being capable of sliding in or out. The setting is determined by the block M which is preferably numbered to indicate the shaft diameter. This assembly consists of the two side plates |5l 5 which slide in the recessions Iii-46 which extend transversely across the shank end of the yoke I I, these plates l5-l5 being carried by the block I3. Pintles |l--l1 project laterally from the block I3 and each carries a roller I8. Each of these pintles is circumferentially grooved to receive a split spring ring l9. Obviously, the block 13 can be adjusted outwardly or inwardly by placing the proper sized block 14 between the block 13 and the yoke H. The plates [5-45 are clamped in place in the recessions l6-l6 by the clamp plate which has an opening therein through which the machine screw 2! is disposed and driven into the corresponding end of the yoke ll.

Numeral 22 generally refers to the two-point pivoting unit and this consists of the carrier 2| operating in the cut-out 23 of the yoke H. The outer walls 24 of the carrier 2| have their intermediate portions struck to provide inwardly disposed tongues 25 which engage into the reduced portions 26 of the rollers 2T--2l. These rollers 21--21 are sufficiently long to extend at their ends beyond the channels 28-28 of the carrier 2|. The tongues 25 serve to prevent displacement of the rollers, loosely holding the rollers in place so that they will rotate whenever an accumulation of grinding residue forms in front of the same.

This unit 22 can be adjusted by the two screws 23-29, the lower ends of which are provided with balls 30 fitting in sockets of the carrier 2|. These screws 29 extend upwardly through the yoke II and are equipped with nuts 3! at their upper ends. Thus the pivoting support can be adjusted readily and will take care of the majority of small irregularities of the shaft.

To take care of the setting of the machine to fit different lengths of journals, a pair of shafts 32-32 are disposed through bores in the free end portion of the yoke II, that is, in the tail portion 33 and these shafts can be held in adjusted position by the tapered head 34 of a screw which is driven into the tail section 33. One end of one of the shafts 32 has the limiting fin 35, while the opposite end of the other shaft 32 has the limiting fin 36. These fins can be moved in or out toward the shaft to conform to the diameter. After the proper setting has been made they are secured in place by the screw head 34.

As can be seen in Figure 1, the tail section 33 is pivotally connected as at 31 to the main section of the yoke and the arcuate-shaped spring 38 having its end portions 39 biting into recesses of the two sections of the yoke serve to hold the yoke urged toward the work 40.

Numeral 4| represents the roller assembly for the tail section 33. This consists of the cylindrical block 42 laterally from which extend the pintles 4343. This block 42 has the threaded shank 44 disposed into the threaded socket 45 of the tail section 33. On the cylindrical block 42 is the block 46 which is capable of rotating on the cylindrical block 42 and through this block 46 extends the pintles 43. Also on the pintles 43 are the rollers 41 which are held in place by the split spring ring 48 fitting in grooves in the pintles 43.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the claimed as new is:

1. In a crankshaft grinder, a yoke adapted to embrace a crankshaft to hold the crankshaft in invention, what is proper relation to a grinder, and means for setnals, said last-mentioned means consisting of pins adjustable through the yoke in opposite directions and means for securing the pins in adjusted relation to the yoke.

3. In a crankshaft grinder, a yoke adapted to embrace a crankshaft, means for setting the yoke to various shaft diameters, and means on the yoke to set the yoke for different length journals, said last-mentioned means consisting of pins adjustable through theyoke in opposite directions and means for securing the pins in adjusted relation to the yoke, and crank arm engageable fins at the outer ends of the pins.

4. In a crankshaft grinder, a sectional work embracing yoke, one of said sections being swingably connected to the other, each of said sections having a notch at the outer portion thereof, and an elongated spring member having inturned end portions engaging into the notches and adapted to hold the swingable sections urged inwardly to work engaged position.

ELMER .FUGLIE. ORE OELKERS. 

